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Acquisition - Additional Information (Detail) (MEGA Brands) In Millions, except Per Share data, unless otherwise specified | 1 Months Ended |
--- | --- | ---
Feb. 28, 2014 USD ($) | Feb. 28, 2014 CAD
Business Acquisition [Line Items] |  |
Expected purchase price | $ 460 |
Business acquisition, price per share |  | 17.75

X
- Definition Expected price to be paid for the acquisition of a business, including net debt to be assumed. + References No definition available. + Details
Name: | mat_ExpectedPaymentsToAcquireBusiness
Namespace Prefix: | mat_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionSharePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant